If you get the question correct you win a prize!

Sharenator.com > If you get the question correct you win a prize!
We have a winner! awesomeeeee will receive the bountiful reward of 100 sharenator points! Thanks all for playing! Catch you all next round and who knows you could be our next big winner!

Suppose f^-1 is the inverse function of a differentiable function f and f(4)=5, f'(4)=2/3. Find (f^-1)'(5).

The first person who gets this correct shall receive 100+ points.

Hint: (f^-1)'(a)=lim as x->a (f^-1(x)-f^-1(a))/(x-a)
Hint 2: (f^-1)(a)=1/f'(f^-1(a))
Hint 3: If f(a)=b then the of f^-1(b)=a

ReportReport this topic to moderators FlagFlag as not safe for work.   Edit  
Views: 562
RATE
16
Posted: 2012-01-10 15:57:03
Psst.

Responses (30) / Sorted by points

I refuse to fall for this,
do your own damn homework.
Posted: 2012-01-10 18:21:43 Report Reply
I know the answer and how to get it. ;)
Trust me there are easier ways of getting homework questions.
Posted: 2012-01-10 19:09:02 Report Reply
MissRandom
MissRandom
Rank: #4
i can't do this
i know math in arabic
i did take QM in college but i still duno these weird words
i passed finance, QM and Economics with the highest grades in class
but i look at what you wrote and m like what?! +3 :D
Posted: 2012-01-10 16:01:29 Report Reply
hightec
hightec
Rank: #116
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19...
so is one of them right
Posted: 2012-01-10 17:25:37 Report Reply
Haha nope, but its in those realm of numbers.
Posted: 2012-01-10 19:09:39 Report Reply
We have a winner! You shall receive 100 points or more from my following posts. Thank you for playing!
Posted: 2012-01-10 22:38:11 Report Reply
thank you
it was a shot in the dark but i got it
Posted: 2012-01-11 08:13:01 Report Reply
Kyleb980
Kyleb980
Rank: #329
Would it be, -5/f^2
?
That Was hard!
Posted: 2012-01-10 16:05:51 Report Reply
Sorry mate no dice.
Posted: 2012-01-10 16:30:29 Report Reply
bufus101
bufus101
Rank: #29
i would know the answer to this but i honestly forget what inversing a function does exactly. i know derivatives left right and sideways but i forget inverse
Posted: 2012-01-10 16:18:27 Report Reply
I know how you feel. I haven't taken calc in a year yet I find myself in calc II now so I thought I'd share the fun I'll be having.
Posted: 2012-01-10 16:31:50 Report Reply
bufus101
bufus101
Rank: #29
lol just wait until calc 3.
Posted: 2012-01-10 16:52:17 Report Reply
Haha that adventure doesn't start until this summer.
Posted: 2012-01-10 17:14:14 Report Reply
bufus101
bufus101
Rank: #29
oh wait isnt the inverse when you switch the x's and y's?
Posted: 2012-01-10 17:22:50 Report Reply
isn't it a reflection on the line y=x ??
Posted: 2012-01-10 18:07:40 Report Reply
bufus101
bufus101
Rank: #29
something like that
Posted: 2012-01-10 18:10:40 Report Reply
hightec
hightec
Rank: #116
i think its like this
2/3 ---> -3/2
Posted: 2012-01-10 21:45:40 Report Reply
hightec
hightec
Rank: #116
that wasn't the answer actually i was giving an example of what i think inverse is.
boy would it be funny if i acctually got it right without trying.
Posted: 2012-01-11 15:52:21 Report
bufus101
bufus101
Rank: #29
is teh answer 4?

**Edit: oh no ^^ is wrong because i did (f-1)(4) not the derivative of it, back to the drawing board!***
Posted: 2012-01-10 17:33:29 Report Reply
You are on the right path my friend. Check the hints, and I think you will get it. ;)
Posted: 2012-01-10 19:13:11 Report Reply
bufus101
bufus101
Rank: #29
is it 30? im doing it a very ass backwards way lol
Posted: 2012-01-10 21:50:33 Report Reply
Haha nope, I think you are just guessing now ;) lol
Posted: 2012-01-10 22:36:28 Report Reply
bufus101
bufus101
Rank: #29
i give up lol. been too long since i did that pewp
Posted: 2012-01-10 23:17:45 Report Reply
I've done trig functions and stuff, but never anything quite this complicated.
Posted: 2012-01-10 19:23:21 Report Reply
the answer to the universe is 42 duh hitch hikers guide to the galixy
Posted: 2012-01-10 21:53:40 Report Reply

Post a response

mrcbccadetx0Posted by:
mrcbccadetx0
Rank: #17

Related posts


Ask Me A Question.Ask Me A Question.
+14 points / misc
QuestionQuestion
+18 points / ask
Ask me a questionAsk me a question
+15 points / ask
QUESTION OF THE WEEKQUESTION OF THE WEEK
+7 points / ask
Question?Question?
+19 points / ask